Hermann bernhard feldmann



llNiTnn STATES PATENT OFFICE.

HERMANN Y BERNHARD yFELDMANN, 'OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOROF ONE-H-ALF TO STEPHEN P. M. TASKER, OE SAME PLACE.

HOPPER FOR P'ULVERIZINGIVIACHINES.

v SPECIFICATION forming part of Letters Patent'No. 294,375, dated March4, 1884.

Application mea July 16, 188,3., (No muda.)

f) @ZZ wwm it may concern: v

Be it known that I, HERMANN BERNHARD FELDMANN, of the city and county ofPhila delphia, and State `of Pennsylvania, have invented certainImprovement-s in Hoppers for Pulverizing-Machines', of which thefollowing is a specification.

My invention is applicable for general use as a hopper with any class ofdevices to which 1o hoppers, as such, are applied. It is howeverespecially designed for employment in connection with a certainpulverizing-machine invented by Villiam Henry Thompson, of Islington,county of MiddleseX,Kingdom of Great Britain, and patented to himin andby Letters Patent of the United States No. 249,489, dated November 15,1881, and with certain apparatus, being improvements upon the same,heretofore patented to me and to Stephen P. M. 2o Tasker, ofPhiladelphia.

Ihe object of my invention is to produce an automatic hopper provided.with adjustable feeding appliances of such construction as to be adaptedto feed a quantity of material pre- 2 5 determined according to the setof said appliances.

A preferred form of a convenient embodiment of my invention ishereinafter described and'claiined.

3o In the accompanying` drawings, Figure 1 is a central verticalsectional elevation of a hopper conveniently embodying my improvements.Fig. 2is `a top plan view of the same, section being supposed in a planeon the dotted line a a of Fig. 1. Fig. 3 is a front elevation of thehopper viewed from the right hand i of Fig. 1 in the direction of thearrow.

In the drawings, A is the casing of the hopper, it being anysuitably-shaped inclosing 4o case or frame providedwithtwoconvergentlyinclined chutes, B, upon which the material is fed, andthrough an openspace, a, between which the material is discharged upon ahorizontal diaphragm, C, suitably affixed across the casing andconstituting the bottom thereof. One side of the horizontal diaphragm isslotted to form the discharge opening D, through which the materialdescends into the pulverizingmachine. The arrangement of 5o the twoinclined chutes relatively to the diaphragm is substantially such asisshown in the lchines from any motor-shaft.

drawings, and such that the material fed upon` caused to descend throughthe above-described opening are the following: f

I E is an oscillatory feed-plate of the breadth of the casing, andsuspended free for oscillation upon an axial rod, e, framed in thecasing. parted to the feed-plate E cause` it to advance the materialdescending through the opening a between the chutes upon the horizontaldiavphragm, across said diaphragm to the discharge opening therein,vthrough which it gravitates.

As a convenient device for imparting the oscillatory movement to thefeed-plate, I have devised the following contrivance, which may beoperated direct from the shaft of the Thomp- Continued impulses ofoscillation im# son pulverizer, or inthe case of other ma- F is amotor-shaft,preferably carrying a flywheel, G, and provided with aneccentric, H, about which is applied an eccentric yoke, I, which isconnected by means ofl a pitman, J, with the lower arm of a bell-cranklever,-K, suitably supported from the hopper, the upper arm of which isconnected withone eX- -tremity of a link or connecting-rod, L, the otherextremity of which is'pivoted to the oscillatory feed-plate. revolutionof the eccentric through theinstrumentality of the yoke and pitmanoccasions the vibration of the bell-crank, theconsequent reciprocationof the link or connecting-rod,and the oscillatory movement of thefeed-plate E.

As a means of conveniently controlling the extent of oscillation of thefeedplate, I have made the point of connection of the link with thevertical arm of the bellcrank adjustable by supporting the link upon apivot-pin, M, projecting from -a sliding sleeve, N, upon the upper endof the bellcrank, theA position f of which sleeve with respect theretobeing controlled by a fixed adjusting-screw, Q, swiveled It will beobvious that a A IOO in the bell-crank and threaded through the slidingsleeve. The position of the pivot-pin with respect to its distance fromthe fulcrum of the bell-crank lever regulates the extent of throw of theoscillatory feed-plate.

I is a spring-controlled door, which constitutes one of the sides of thecasing opposite to the oscillatory feed-plate. The ofice of this door,which is suspended from an axial rod above, and which below bearsagainsta spiral spring, p, is to permit of the discharge of such anaccumulation of material, under the very rapid operation of the device,as would be too great to escape through the discharge-opening D.

The operation of the oscillatory feed-plate is to advance apredetermined quantity of material deposited upon the horizontaldiaphragm across said diaphragm into the discharge-open ing formedtherein. rlhe hopper is preferably continuously supplied withmaterial,as its discharging capacity is very great.

Such being adescription of a preferred form of my apparatus, it isproper for me to state that other means than the eccentric, bell-crank,and connections may be employed toimpart the oscillatory throw to thefeed-plate, and that I have simply instan ced the arrangementrepresented as one convenient for the purpose.

I am aware that I am not the rst to employ an oscillatory plate inconnection with a hopper, broadly considered, and to such device,broadly, I lay no claim.

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. Ina hopper, the combination of an inclosing-casing, adiaphragm or iioor therein provided with a discharge-opening, chutes orkindred devices adapted to direct the deposit of material fed into thecasing upon the diaphragm, an oscillatory feed-plate adapted to occasionthe feed of a predetermined quantity of material deposited upon thediaphragm to the discharge-opening therein, and means for occasioningthe oscillation of the feed-plate, substantially as set forth.

2. rlhe combination, with an inclosing-casing containing convergentchutes, and a diaphragm provided with a discharge-opening, substantiallyas set forth, of an oscillatory feedplate, a link, a bell-crank lever,an eccentric yoke, and an eccentric, all substantially as set forth.

3. In combination with a casing for a hopper provided with the inclinedconvergent chutes and the horizontal diaphragm and the oscillatoryfeed-plate, the spring-controlled door, substantially as and for thepurpose set forth.

In testimony whereof I have hereunto signed my naine this 2d day ofJuly, A. D. 1883.

HERMANN BERNHARD FELDMANN.

In presence of- J. BoNsALL TAYLOR, JOHN JoLLnY, J r.

